CVE-2026-74733
gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock
CVSS Score
7.8
EPSS Score
0.2%
EPSS Percentile
6th
In the Linux kernel, the following vulnerability has been resolved: gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock Locking is disabled in the regmap config as this driver uses its own lock. This means that all calls to regmap functions (read or write) must hold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do this, and it was therefore possible that multiple threads could cause an incorrect register to be read/written. A previous patch partly fixed this, but only protected the write to the interrupt mask register, and not the read from the direction register.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 22, 2026 |
| Last Updated | Aug 25, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new high vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
bfc6444b57dc7186b6acc964705d7516cbaf3904 < e6a2f5f845f50b0c4299bace5111f56d3390a090 bfc6444b57dc7186b6acc964705d7516cbaf3904 < 9dc325327babe7f159e84cbe9380a45342da0585 58a5c93bd1a6e949267400080f07e57ffe05ec34 e2ecdddca80dd845df42376e4b0197fe97018ba2 de7cffa53149c7b48bd1bb29b02390c9f05b7f41 6.1.101 < 6.2 6.6.42 < 6.7 6.9.11 < 6.10
Linux / Linux
6.10